package com.zhukaiyuan.oauth2.server.configure;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Lazy;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerEndpointsConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerSecurityConfigurer;
import org.springframework.security.oauth2.provider.ClientDetailsService;
import org.springframework.security.oauth2.provider.client.JdbcClientDetailsService;
import org.springframework.security.oauth2.provider.token.TokenStore;
import org.springframework.security.oauth2.provider.token.store.JdbcTokenStore;

import javax.annotation.Resource;
import javax.sql.DataSource;
import java.time.LocalDateTime;

/**
 * 授权服务配置
 * 配置回调地址
 * @author apple
 */
@Configuration
@EnableAuthorizationServer
public class AuthorizationConfiguration extends AuthorizationServerConfigurerAdapter {
    /**
     * 注入用于支持 password 模式
     */
    @Autowired
    private AuthenticationManager authenticationManager;

    /**
     * 默认的加密方式
     * @return {@link BCryptPasswordEncoder}
     */
    @Bean
    public BCryptPasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    /**
     * Refresh Token 时需要自定义实现，否则抛异常 <br>
     * Lazy 注解是为了防止循环注入（is there an unresolvable circular reference?）
     */
//    @Lazy
//    @Resource(name = "userDetailsServiceBean")
    @Autowired
    private UserDetailsService userDetailsService;


    @Qualifier("dataSource")
    @Autowired
    private DataSource dataSource;
    @Bean
    public ClientDetailsService jdbcClientDetailsService(){
        return new JdbcClientDetailsService(dataSource);
    }

    @Bean public TokenStore tokenStore(){
        return new JdbcTokenStore(dataSource);
    }


    /**
     * 配置客户端信息（最佳实践需要配置在数据库）
     * @param clients
     * @throws Exception
     */
    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.withClientDetails(jdbcClientDetailsService());
    }


    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints
                // 用于支持密码模式
                .authenticationManager(authenticationManager)
                .tokenStore(tokenStore())
                .userDetailsService(userDetailsService);
    }

    @Override
    public void configure(AuthorizationServerSecurityConfigurer security) throws Exception {
        security
                // 允许客户端访问 /oauth/check_token 检查 token
                // 等同于在ignores里忽略/oauth/check_token
                .checkTokenAccess("isAuthenticated()").allowFormAuthenticationForClients();
    }
}
